`
`CLAIMS
`
`the application:
`
`i. A drive systemfor a vehicle, comprising:
`
`an energy storage system CiSS);
`
`a power conversion device coupled to the ESS;
`
`a first electric motor coupled to the power conversion device;
`
`a second electric motor coupled to the power conversion device;
`
`a transmission device coupled to the first electric motor;
`
`a powersplit device coupled to the transmission device and the second
`
`electric motor, the power spht device comprising one or more planetarysets;
`
`and
`
`an energy management system (MS) configured to:
`
`enable the first electric motor to operate as a motor to drive the
`
`vehicle in a first mode of operation whenthe vehicle is cruising; and
`
`enable the first electric motor and second electric motorto
`
`operate as motors to drive the vehicle in a second mode ofoperation
`
`when the vehicle is accelerating.
`
`The drive systemof claim 1, wherein the ESS comprisesa first energy
`
`storage unit and a second energy storage unit.
`
`Ge
`
`The drive system of claim 2, wherein the first energy storage unit comprises a
`
`battery and the second energy storage unit comprises an ultra-capacitor.
`
`The drive system of claim 1, further comprising a first inverter coupled
`
`between the ESS andthe first electric motor and a second inverter coupled
`
`between the ESS and the second electric motor.
`
`20
`
`
`
`5. The drive systemof claim 1, further comprising a pre-charging switching
`
`device.
`
`6. The drive system of claim 1, wherein the EMSis further configuredto enable
`
`the secondelectric motor to operate as a generatorin the first mode of
`
`operation when the vehicle is cruising.
`
`~JAn electric drive system for a vehicle, comprising:
`
`an energy storage system GiSS):;
`
`a power conversion device coupled to the HSS;
`
`a first inverter coupled to the power conversion device;
`
`a first AC motor coupledto the first inverter;
`
`a secondinverter coupled to the power conversion device;
`
`a second AC motor coupled to the secondinverter;
`
`a transmission device coupled to the first AC motor:
`
`a power split device coupledto the transmission device andthe second
`
`AC motor, the power spht device comprising one or more planetary sets; and
`
`an energy management system C{MS) configured to selectively:
`
`enable the first AC motor to operate as a motor to drive the
`
`vehicle when the vehicle is cruising; and
`
`enable the firstAC motor and second AC motor to operate as
`
`motors to drive the vehicle when the vehicle is accelerating.
`
`8. Theelectric drive system of claim 7, wherein the ESS comprises a first energy
`
`storage unit and a secondenergy storage unit.
`
`9. The drive systemof claim 8, wherein the first energy storage unit comprises a
`
`2k
`
`
`
`battery and the second energy storage unit comprises an ultra-capacitor.
`
`10. Theelectric drive system of claim 7, further comprising a pre-charging
`
`switching device.
`
`11. The electric drive system of claim 7, wherein the EMSis further configured to
`
`enable the second AC motorte operate as a generator when the vehicle is
`
`cruising.
`
`12.4 drive system for a vehicle, comprising:
`
`an energy storage system (ESS);
`
`a power conversion device coupled to the ESS;
`
`a first electric motor coupled to the power conversion device;
`
`a secondelectric motor coupled to the power conversion device;
`
`a transmission device coupledto the first electric motor;
`
`a power split device coupled to the transmission device and the second
`
`electric motor, the power split device comprising one or more planetary sets;
`
`and
`
`an energy management system (EMS) configured to:
`
`enable the first electric motor te operate as a motor to drive the
`
`vehicle in a first mode of operation whenthe vehicle is cruising; and
`
`enable the first electric motor and second electric motor to
`
`operate as motors to drive the vehicle in a third made of operation
`
`when the vehicle is in an uphill mode.
`
`13. The drive system of claim 12, wherein the ESS comprises a first energy
`
`storage unit and a second energy storage unit.
`
`7"eates
`
`
`
`14. The drive system of claim 13, wherein the first energy storage unit comprises
`
`a battery and the second energy storage unit comprises an ultra-capacitor.
`
`15. The drive system of claim 12, further comprising a first inverter coupled
`
`between the ESS andthe first electric motor and a second inverter coupled
`
`between the ESS and the second electric motor.
`
`16. The drive system of claim 12, further comprising a pre-charging switching
`
`device.
`
`17.The drive system of claim 12, wherem the EMSis further configured to
`
`enable the second electric motor to operate as a generator in the first mode of
`
`operation when the vehicle is cruising.
`
`bo Ge
`
`
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